Two arrested as Moscow metro crash leaves 22 dead

Russian investigators have detained two employees of the Moscow subway where 22 people died and more than a hundred were injured in a train derailment on Tuesday.

Officials said that they have detained the head of the track department and his deputy.

A new rail switch at the point where the train left the tracks was not properly installed during repair works in May and was in fact attached to the rail by a single wire, according to investigators.

More than 1,100 people were evacuated from the train, which was stuck between two stations in Moscow's west, in a rescue operation that lasted more than 12 hours.